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Finding the Fourth Proportional to 23,081.70, 31,879.02 and 15,514.89

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Solution

The fourth proportional to 23,081.70, 31,879.02 and 15,514.89 is: 21,428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,081.70 : 31,879.02 = 15,514.89 : x
  2. Step 2: Convert to fraction form
    23,081.70/31,879.02 = 15,514.89/x
  3. Step 3: Cross multiply
    23,081.70x = 31,879.02 × 15,514.89
  4. Step 4: Simplify right side
    23,081.70x = 494,599,488.61
  5. Step 5: Solve for x
    x = 494,599,488.61/23,081.70
  6. Step 6: Final answer
    x = 21,428.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.